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Which is hotter f or c?
Neither is hotter. They are different scales and use different measurements for heat. 25C is hotter than 25F, but they are different temperatures.
Why does a properly finished valve seat have three different angles?
For proper form, operation, and heat disburstment.
Why different fractions of crude oil are collected at different temperatures?
Because crude oil is a mixture of different chemicals - mainly hydrocarbons - that have different evaporation temperatures. Roughly speaking, when the crude is heated, its temperature rises until it reaches the lowest vaporisation temperature. The temperature then remains more or less steady as the heat input is used as the latent heat of vaporisation for the relevant compound. When [almost] all of that compound has evaporated, the temperature starts rising again until it reaches the next varorisation temperature, and so on.
What kinds of tools do scientists use to make measurements?
scientist use many tools but the most common is the tools in the SI unit and conversions-LENGTH meter,kilometer,decimeter,centimeter,millimeter,micrometer,nanometerVOLUME-cubic centimeter,liter,cubicmeter,millimeter MASS-kilogram,gram,milligram TEMPERTURE-kelvin,celsius scientist use many tools but the most common is the tools in the SI unit and conversions-LENGTH meter,kilometer,decimeter,centimeter,millimeter,micrometer,nanometerVOLUME-cubic centimeter,liter,cubicmeter,millimeter MASS-kilogram,gram,milligram TEMPERTURE-kelvin,celsius
Disadvantages of heat?
The disadvantages of heat are that if there is no solar energy, then there is no heat.
